WO2013024443A1 - Resélection de cellule de communication sans fil - Google Patents

Resélection de cellule de communication sans fil Download PDF

Info

Publication number
WO2013024443A1
WO2013024443A1 PCT/IB2012/054153 IB2012054153W WO2013024443A1 WO 2013024443 A1 WO2013024443 A1 WO 2013024443A1 IB 2012054153 W IB2012054153 W IB 2012054153W WO 2013024443 A1 WO2013024443 A1 WO 2013024443A1
Authority
WO
WIPO (PCT)
Prior art keywords
reselection
cell
instance
causing
mobile terminal
Prior art date
Application number
PCT/IB2012/054153
Other languages
English (en)
Inventor
Brian Martin
Keiichi Kubota
Tao Chen
Original Assignee
Renesas Mobile Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Renesas Mobile Corporation filed Critical Renesas Mobile Corporation
Priority to CN201280036974.4A priority Critical patent/CN103891350A/zh
Publication of WO2013024443A1 publication Critical patent/WO2013024443A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/20—Performing reselection for specific purposes for optimising the interference level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections

Definitions

  • Embodiments of the present invention relate generally to wireless communications and, more particularly, although not exclusively, to suspension and/or release of a resource for triggering reselection of a serving cell.
  • the communications between a mobile terminal and a serving cell may sometimes create interference with neighbor cells.
  • This interference may inhibit the operation of the neighbor cells or may at least cause the mobile terminal and/or the neighbor cells to operate less efficiently.
  • the mobile terminal and the serving cell may monitor the neighbor cells in such a manner that instances of neighbor cell interference may be identified and the operation of the mobile terminal and/or the serving cell may be modified in such a manner as to reduce the potential for the neighbor cell interference.
  • the neighbor cells may be added to the active set so as to be involved in uplink power control.
  • the mobile terminal may receive signals from the serving cell as well as from the neighbor cells.
  • neighbor cells may identify instances in which the mobile terminal is creating interference such that the mobile terminal may reduce its uplink power in an effort to correspondingly reduce the neighbor cell interference. More particularly, for a mobile terminal operating in a CELL DCH state, the uplink power from the mobile terminal may be controlled via relative grants from neighbor cells within the active set of the mobile terminal.
  • the mobile terminal may not communicate with the neighbor cells in the same manner and, as such, may not be able to identify instances of potential neighbor cell interference.
  • a mobile terminal in a CELL FACH state may only receive signals from the serving cell.
  • the neighbor cells are unable to communicate with the mobile terminal in order to request that the power, such as the uplink power, be reduced in an effort to correspondingly reduce the neighbor cell interference.
  • a mobile terminal operating in the CELL FACH state may not have similar control of its uplink power since the uplink power of the mobile terminal may only be controlled by the serving cell using absolute grants without consideration of possible neighbor cell interference.
  • a mobile terminal that is creating neighbor cell interference may impair the operation of the neighbor cells and, in some instances, may suffer from radio link failure.
  • an enhanced uplink for a mobile terminal in the CELL FACH state in the idle mode was introduced.
  • This enhanced uplink is termed a common enhanced dedicated channel (Common E- DCH).
  • mobile terminals may utilize the E-DCH in other radio resource control (RRC) states in addition to or other than the CELL DCH state.
  • RRC radio resource control
  • the issues relating to potential neighbor cell interference while a mobile terminal is operating in the CELL FACH state may also become more frequent and problematic.
  • a number of signaling based methods have been proposed in an effort to provide some measure of interference control for the neighbor cells in instances in which a mobile terminal is operating in the CELL FACH state.
  • the proposals have generally suffered from various drawbacks including, for example, increased complexity for the mobile terminal and/or the serving cell or the failure to address all use cases or scenarios.
  • a method, apparatus and computer program product are therefore generally provided (according to an example embodiment to be described) in order to trigger a reselection of a serving cell in an instance in which a mobile terminal may be creating interference with a neighbor cell.
  • the mobile terminal may release and/or suspend a network resource, such as an enhanced dedicated channel (E-DCH), in order to trigger a reselection of a new serving cell.
  • E-DCH enhanced dedicated channel
  • the method, apparatus and computer program product may trigger reselection of a new cell in an instance in which neighbor cell interference has been potentially created while the mobile terminal is in the CELL FACH state.
  • the method, apparatus and computer program product of example embodiments of the present invention may reduce neighbor cell interference, thereby improving overall system performance.
  • a wireless communications method comprises determining based on reselection data the presence of a cell reselection condition, in an instance in which a cell reselection condition is determined to be present, causing a network resource to be modified, and causing a reselection of a serving cell.
  • an apparatus comprises processing means arranged to: determine based on received reselection data the presence of a cell reselection condition, in an instance in which a cell reselection condition is determined to be present, cause a network resource to be modified, and cause a reselection of a serving cell.
  • a method comprises determining the presence of uplink interference while a mobile terminal is in a CELL FACH state, in an instance where the presence of uplink interference is determined, causing an enhanced dedicated channel "E-DCH" to be modified, and causing a reselection of a serving cell.
  • E-DCH enhanced dedicated channel
  • a computer program product includes at least one computer-readable storage medium having computer-readable program instructions stored therein, the computer-readable program instructions including program instructions configured, when executed, to determine based on reselection data the presence of a reselection condition, in an instance in which the reselection condition is determined to be present, cause a network resource to be modified, and cause a reselection of a serving cell.
  • a computer program product includes at least computer-readable storage medium having computer-readable program instructions stored therein, the computer-readable program instructions including program instructions configured, when executed, to determine the presence of uplink interference while a mobile terminal is in a CELL FACH state, in an instance in which the presence of uplink interference is determined, to cause an E-DCH to be modified, and to cause a reselection of a serving cell.
  • Figure 1 is a schematic representation of a system having a serving cell and one or more neighbor cells that may experience interference created by the mobile terminal and that may benefit from an embodiment of the present invention
  • FIG. 2 is a block diagram of an apparatus that may be embodied by a mobile terminal in accordance with one embodiment of the present invention
  • Figure 3 is a flow chart illustrating operations performed in accordance with one embodiment of the present invention.
  • FIG. 4 is a flow diagram illustrating the flow chart of operations performed in accordance with another embodiment of the present invention. Detailed Description
  • circuitry refers to all of the following: (a)hardware- only circuit implementations (such as implementations in only analog and/or digital circuitry) and (b) to combinations of circuits and software (and/or firmware), such as (as applicable): (i) to a combination of processor(s) or (ii) to portions of processor(s)/software (including digital signal processor(s)), software, and memory(ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and
  • circuits such as a microprocessor(s) or a portion of a microprocessor(s), that require software or firmware for operation, even if the software or firmware is not physically present.
  • circuitry would also cover an implementation of merely a processor (or multiple processors) or portion of a processor and its (or their) accompanying software and/or firmware.
  • circuitry would also cover, for example and if applicable to the particular claim element, a baseband integrated circuit or application specific integrated circuit for a mobile phone or a similar integrated circuit in a server, a cellular network device, or other network device.
  • a method, apparatus and computer program product of an example embodiment of the present invention are configured to determine instances in which a mobile terminal may be creating neighbor cell interference, such as a result of interference created by uplink transmissions from the mobile terminal to a serving cell.
  • a network resource such as an E-DCH
  • the mobile terminal may select a new serving cell in an effort to reduce neighbor cell interference.
  • the mobile terminal identifies the potential for neighbor cell interference while in the CELL FACH state, thereby permitting neighbor cell interference to be reduced or otherwise addressed even while the mobile terminal is in the CELL FACH state.
  • Figure 1 which includes a first communication device (e.g., mobile terminal 10) that is capable of communication via a serving cell 12, such as a base station, a Node B, an evolved Node B (eNB) or other access point, with a network 14 (e.g., a core network).
  • a serving cell 12 such as a base station, a Node B, an evolved Node B (eNB) or other access point
  • eNB evolved Node B
  • network 14 e.g., a core network
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • other networks may support the method, apparatus and computer program product of embodiments of the present invention including those configured in accordance with wideband code division multiple access (W- CDMA), CDMA2000, global system for mobile communications (GSM), general packet radio service (GPRS) and/or the like.
  • W- CDMA wideband code division multiple access
  • CDMA2000 CDMA2000
  • GSM global system for mobile communications
  • GPRS general packet radio service
  • the network 14 may include a collection of various different nodes, devices or functions that may be in communication with each other via corresponding wired and/or wireless interfaces.
  • the network may include one or more cells, including serving cell 12 and one or more neighbor cells 16 (designated neighbor cell 1 , neighbor cell 2,...neighbor cell n in the embodiment of Figure 1 ), each of which may serve a respective coverage area.
  • the serving cell and the neighbor cells could be, for example, part of one or more cellular or mobile networks or public land mobile networks (PLMNs).
  • PLMNs public land mobile networks
  • processing devices e.g., personal computers, server computers or the like
  • a communication device such as the mobile terminal 10 (also known as user equipment (UE)), may be in communication with other communication devices or other devices via the serving cell 12 and, in turn, the network 14.
  • the communication device may include an antenna for transmitting signals to and for receiving signals from a serving cell.
  • the mobile terminal 10 may be a mobile communication device such as, for example, a mobile telephone, a portable digital assistant (PDA), a pager, a laptop computer, or any of numerous other hand held or portable communication devices, computation devices, content generation devices, content consumption devices, or combinations thereof.
  • the mobile terminal 10 may include one or more processors that may define processing circuitry either alone or in combination with one or more memories.
  • the processing circuitry may utilize instructions stored in the memory to cause the mobile terminal 10 to operate in a particular way or execute specific functionality when the instructions are executed by the one or more processors.
  • the mobile terminal 10 may also include communication circuitry and corresponding hardware/software to enable communication with other devices and/or the network 14.
  • the mobile terminal 10 and/or the serving cell 12 may be embodied as or otherwise include an apparatus 20 as generically represented by the block diagram of Figure 2. While the apparatus 20 may be employed, for example, by a mobile terminal 10 or a serving cell 12, it should be noted that the components, devices or elements described below may not be mandatory and thus some may be omitted in certain embodiments. Additionally, some embodiments may include further or different components, devices or elements beyond those shown and described herein.
  • the apparatus 20 may include or otherwise be in communication with processing circuitry 22 that is configurable to perform actions in accordance with example embodiments described herein.
  • the processing circuitry may be configured to perform data processing, application execution and/or other processing and management services according to an example embodiment of the present invention.
  • the apparatus or the processing circuitry may be embodied as a chip or chip set.
  • the apparatus or the processing circuitry may comprise one or more physical packages (e.g., chips) including materials, components and/or wires on a structural assembly (e.g., a baseboard).
  • the structural assembly may provide physical strength, conservation of size, and/or limitation of electrical interaction for component circuitry included thereon.
  • the apparatus or the processing circuitry may therefore, in some cases, be configured to implement an embodiment of the present invention on a single chip or as a single "system on a chip.”
  • a chip or chipset may constitute means for performing one or more operations for providing the functionalities described herein.
  • the processing circuitry 22 may include a processor 24 and memory 28 that may be in communication with or otherwise control a communication interface 26 and, in some cases, a user interface 30.
  • the processing circuitry may be embodied as a circuit chip (e.g., an integrated circuit chip) configured (e.g., with hardware, software or a combination of hardware and software) to perform operations described herein.
  • the processing circuitry may be embodied as a portion of a mobile computing device or other mobile terminal.
  • the user interface 30 may be in communication with the processing circuitry 22 to receive an indication of a user input at the user interface and/or to provide an audible, visual, mechanical or other output to the user.
  • the user interface may include, for example, a keyboard, a mouse, a joystick, a display, a touch screen, a microphone, a speaker, and/or other input/output mechanisms.
  • the apparatus 20 need not always include a user interface. For example, in instances in which the apparatus is embodied as a serving cell 12, the apparatus may not include a user interface. As such, the user interface is shown in dashed lines in Figure 2.
  • the communication interface 26 may include one or more interface mechanisms for enabling communication with other devices and/or networks.
  • the communication interface may be any means such as a device or circuitry embodied in either hardware, or a combination of hardware and software that is configured to receive and/or transmit data from/to a network 14 and/or any other device or module in communication with the processing circuitry 22, such as between the mobile terminal 10 and the serving cell 12.
  • the communication interface may include, for example, an antenna (or multiple antennas) and supporting hardware and/or software for enabling communications with a wireless communication network and/or a communication modem or other hardware/software for supporting communication via cable, digital subscriber line (DSL), universal serial bus (USB), Ethernet or other methods.
  • DSL digital subscriber line
  • USB universal serial bus
  • the memory 28 may include one or more non-transitory memory devices such as, for example, volatile and/or non-volatile memory that may be either fixed or removable.
  • the memory may be configured to store information, data, applications, instructions or the like for enabling the apparatus 20 to carry out various functions in accordance with example embodiments of the present invention.
  • the memory could be configured to buffer input data for processing by the processor 24.
  • the memory could be configured to store instructions for execution by the processor.
  • the memory may include one of a plurality of databases that may store a variety of files, contents or data sets.
  • applications may be stored for execution by the processor in order to carry out the functionality associated with each respective application.
  • the memory may be in communication with the processor via a bus for passing information among components of the apparatus.
  • the processor 24 may be embodied in a number of different ways.
  • the processor may be embodied as various processing means such as one or more of a microprocessor or other processing element, a coprocessor, a controller or various other computing or processing devices including integrated circuits such as, for example, an ASIC (application specific integrated circuit), an FPGA (field programmable gate array), or the like.
  • the processor may be configured to execute instructions stored in the memory 28 or otherwise accessible to the processor.
  • the processor may represent an entity (e.g., physically embodied in circuitry - in the form of processing circuitry 22) capable of performing operations according to embodiments of the present invention while configured accordingly.
  • the processor when the processor is embodied as an ASIC, FPGA or the like, the processor may be specifically configured hardware for conducting the operations described herein.
  • the processor when the processor is embodied as an executor of software instructions, the instructions may specifically configure the processor to perform the operations described herein.
  • FIG. 3 and 4 flowcharts illustrating the operations performed by a method, apparatus and computer program product, such as apparatus 20 of Figure 2, from the perspective of a mobile terminal 10 in accordance with one embodiment of the present invention are illustrated.
  • each block of the flowcharts, and combinations of blocks in the flowcharts may be implemented by various means, such as hardware, firmware, processor, circuitry and/or other device associated with execution of software including one or more computer program instructions.
  • one or more of the procedures described above may be embodied by computer program instructions.
  • the computer program instructions which embody the procedures described above may be stored by a memory device 28 of an apparatus employing an embodiment of the present invention and executed by a processor 24 in the apparatus.
  • any such computer program instructions may be loaded onto a computer or other programmable apparatus (e.g., hardware) to produce a machine, such that the resulting computer or other programmable apparatus provides for implementation of the functions specified in the flowcharts' block(s).
  • These computer program instructions may also be stored in a non-transitory computer-readable storage memory that may direct a computer or other programmable apparatus to function in a particular manner, such that the instructions stored in the computer-readable storage memory produce an article of manufacture, the execution of which implements the function specified in the flowcharts' block(s).
  • the computer program instructions may also be loaded onto a computer or other programmable apparatus to cause a series of operations to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide operations for implementing the functions specified in the flowcharts' block(s).
  • the operations of Figures 3 and 4 when executed, convert a computer or processing circuitry into a particular machine configured to perform an example embodiment of the present invention.
  • the operations of each of Figures 3 and 4 define an algorithm for configuring a computer or processing circuitry 22, e.g., processor, to perform an example embodiment.
  • a general purpose computer may be provided with an instance of the processor which performs the algorithm of a respective one of Figures 3 and 4 to transform the general purpose computer into a particular machine configured to perform an example embodiment.
  • blocks of the flowcharts support combinations of means for performing the specified functions and combinations of operations for performing the specified functions. It will also be understood that one or more blocks of the flowchart, and combinations of blocks in the flowcharts, can be implemented by special purpose hardware-based computer systems which perform the specified functions, or combinations of special purpose hardware and computer instructions.
  • FIG. 3 is a flow chart illustrating serving cell reselection performed in accordance with one embodiment of the present invention.
  • the apparatus 20 embodied, for example, by a mobile terminal 10, may include means, such as the processing circuitry 22, the processor 24, the communications interface 26 or the like, for receiving reselection data.
  • reselection data may comprise interference data, reselection criteria, and/or a network command.
  • Reselection criteria in one embodiment, is that criteria that would generally cause an apparatus 20, such as mobile terminal 10, to transition from a current serving cell, such as serving cell 12, to another serving cell, such as neighbor cell 16 when a neighbor cell 16 received power is determined to be higher than the serving cell 12 received power.
  • the received reselection data may also include interference data.
  • Interference data may indicate the level of interference between a mobile terminal, such as mobile terminal 10, and one or more neighbor cells, such as neighbor cell 16.
  • the apparatus 20 may also include means, such as the processing circuitry 22, the processor 24 or the like, for determining the presence of a reselection condition.
  • a reselection condition may occur in an instance in which it is determined, such as by the processor, that the reselection criteria have been met, in an instance in which it is determined, again such as by the processor, that interference exists between the mobile terminal and one or more neighboring cells and/or in an instance in which a network command is received, such as by the communications interface, that indicates that the mobile terminal, for example, is to release a network resource, such as the E- DCH.
  • Potential interference between the mobile terminal 10 and neighbor cells 16 may be identified in various manners including, for example, by analyzing the transmission power of the mobile terminal, path loss and/or neighbor cells' uplink interference levels may be analyzed.
  • the apparatus 20, such as the processor 24, may determine the transmission power of the signals transmitted via the uplink dedicated physical control channel (DPCCH) to the serving cell 12.
  • DPCCH uplink dedicated physical control channel
  • the mobile terminal 10 may be located relatively far from the serving cell and/or the mobile terminal 10 may be suffering from uplink interference from other mobile terminals served by the neighbor cells 16.
  • a relatively high transmission power for signals transmitted via an uplink channel of the mobile terminal 10 may create interference with the neighbor cells 16.
  • the apparatus 20, such as the processor 24, may determine, in one embodiment, the path loss may be determined to be the difference between the value of the primary common pilot channel (CPICH) transmission power as signaled by the network and the CPICH received signal code power (RSCP) as measured by the mobile terminal.
  • the path loss of a neighbor cell 16 provides an indication as to the distance between the mobile terminal 10 and the neighbor cell 16. In an instance in which the path loss is relatively small, the mobile terminal 10 may be relatively near the neighbor cell 16 , thereby increasing the likelihood that the signal transmissions by the mobile terminal 10 may create interference for the neighbor cell 16. Conversely, in an instance in which the path loss is relatively large, the mobile terminal may be relatively far away from the neighbor cell such that there is a lower likelihood that the signal transmissions from the mobile terminal 10 will create interference for the neighbor cell 16.
  • CPICH primary common pilot channel
  • RSCP CPICH received signal code power
  • the apparatus 20 may additionally or alternatively include means, such as the processing circuitry 22, the processor 24 or the like, for determining other parameters or conditions associated with the operation of the mobile terminal 10 that may be indicative of neighbor cell interference.
  • the apparatus such as the processor, the communication interface 26 or the like, may receive information provided by the neighbor cell 16, such as via a system information block (SIB), e.g., SIB7, so as to obtain information regarding the uplink interference level of the neighbor cell.
  • SIB system information block
  • the apparatus 20, such as the processor 24, may determine if the operation of the mobile terminal 10 is creating or is likely to have created interference for the neighbor cells 16.
  • the apparatus 20, such as the processor 24, may be configured to compare the transmission power to a first threshold with the transmission power satisfying the first threshold by exceeding the first threshold, to compare the path loss to a second threshold with the path loss satisfying the second threshold by being less than the second threshold and optionally compare one or more other parameters, such as the uplink interference level, to respective thresholds.
  • the thresholds may be pre-defined and stored by memory 28 of the apparatus 20.
  • a network element such as the serving cell 12, a radio network controller or the like, may notify the mobile terminal of the respective thresholds, such as via an RRC measurement control message or via system information, such as SIB5, SIB1 1 , SIB l lbis and/or SIB 12.
  • the apparatus 20, such as the processor 24, may determine that a reselection condition may be present based on the above described reselection criteria and interference data, alone or in combination.
  • the apparatus 20, such as the processor 24, may alternatively or additionally determine that a reselection condition is present based upon the existence of a predetermined amount of data to be transmitted to/from the mobile terminal. For example, when there is only a small amount of data to be transmitted (e.g., a common control channel (CCCH) transmission) then there is a lower probability of a reselection condition and thus a lower chance that a network resource, such as the E-DCH, needs to be suspended.
  • CCCH common control channel
  • a network resource such as the E-DCH
  • the network resource may be released and or suspended in order to permit reselection to occur prior to the transfer of the large amount of data.
  • the apparatus 20 may also include means, such as the processing circuitry 22, the processor 24, communications interface 26 or the like, for causing a report to be transmitted.
  • the apparatus may advise a serving cell, a network resource, radio network controller and/or the like, that a network resource, such as the E-DCH, has been released.
  • the report that is caused to be transmitted by the apparatus 20, such as the mobile terminal 10 may provide a buffer status, such as an empty buffer status regardless of the actual state of the buffer.
  • TEBS Total E-DCH Buffer Status
  • SI scheduling information
  • the apparatus 20, such as the mobile terminal 10 may add a new field to the SI that functions to transmit a report to a network resource, radio network controller and/or the like indicating that the network resource, such as the E-DCH, may need to be suspended.
  • the new field may also take the form of a special value of TEBS.
  • the new field may also take the form of a special value of Channel Quality Indication (CQI).
  • CQI Channel Quality Indication
  • the apparatus 20 may also include means, such as the processing circuitry 22, the processor 24, communications interface 26 or the like, for causing a network resource, such as the E-DCH, to be modified in an instance in which the presence of a reselection condition has been identified and a report has provided to the network.
  • the apparatus 20, such the mobile terminal 10 modifies the network resource by autonomously releasing or suspending the network resource, such as the E-DCH. By autonomously acting, the mobile terminal 10 may reduce latency.
  • the network resource, such as the E-DCH may be released while the apparatus 20, such as the mobile terminal 10, is in the CELL-FACH state using an inactive absolute grant.
  • an inactive absolute grant and/or an autonomous action by the apparatus 20, such as the mobile terminal 10 may also be accompanied by the establishment of a timeout procedure, such as defined by a timer.
  • the timeout procedure defined by the timer may be configured to prevent the requesting of another resource within the timeout procedure or may prevent the mobile terminal from requesting a new resource until the interference conditions are no longer present.
  • the apparatus 20, embodied, for example, by the mobile terminal 10, may receive a message using means such as the processor 24 and the communications interface 26, for receiving a message from a serving cell 12, a network resource, radio network controller and/or the like that causes the modification of the network resource, such as the E-DCH as is described with respect to Operation 36 of Figure 3.
  • a command e.g., absolute grant value, high speed shared control channel order, and/or MAC header information
  • the mobile terminal 10 may receive an indication of a modified serving grant (e.g., mobile terminal transmit power is reduced to avoid interference) which causes the mobile terminal 10 to suspend or release the resource.
  • a message may indicate that the apparatus 20, embodied by, for example, the processor 24, may apply a specific bias, offset and/or priority to a neighbor cell or frequency when evaluating reselection as shown with respect to Operation 38.
  • applying a specific bias, offset and/or priority to a neighbor cell effectively allows for a fast trigger for cell reselection.
  • the use of RRC signalling to release the RRC connection and perform redirection may be avoided.
  • the mobile terminal 10 may reselect and maintain the RRC signalling and any packet data protocol (PDP) context to be re-established on the other frequency.
  • PDP packet data protocol
  • an apparatus embodied, by for example, the serving cell 12 may trigger a reselection condition.
  • the serving cell 12 may trigger a reselection condition without the mobile terminal 12 reporting an interference condition and/or the presence of reselection criteria.
  • a serving cell 12, in an instance in which the network experiences high load on a frequency may for example, cause a network transmission that indicates a reselection condition as described with reference to Figure 3 to cause the mobile terminal 10 to modify a network resource, such as the E-DCH for purposes of load balancing.
  • the release of the network resource, such as the E-DCH would be triggered by the serving cell 12 (e.g. via High Speed Shared Control Channel order, or inactive grant, etc) and the network command would likely be accompanied by a reselection offset.
  • the reselection offset is configured to cause the mobile terminal 10 to switch to another frequency.
  • the apparatus 20, embodied, for example, by the processor 24, may receive a specific adjustment for a reselection calculation.
  • a reselection calculation may include applying a temporary bias (such as offset and/or priority) for neighboring cells 16.
  • the apparatus 20 may also include means, such as the processing circuitry 22, the processor 24, communications interface 26 or the like, for causing the reselection of a serving cell.
  • the apparatus 20, such as the mobile terminal 10 may perform reselection of a new serving cell to avoid interference situations.
  • the reselection may include activating a previous serving cell that was suspended or released, by the mobile terminal 10.
  • the radio resource control (RRC) layer may indicate to the medium access control (MAC) that a network resource, such as an E-DCH resource, should be suspended or released.
  • RRC radio resource control
  • MAC medium access control
  • the method, apparatus and computer program product of one embodiment are configured to permit a mobile terminal 10 operating in a CELL FACH to determine the potential for neighbor cell interference and to suspend and/or release a network resource, such as the E-DCH, to trigger reselection of a cell even while the mobile terminal is in the CELL FACH state.
  • a network resource such as the E-DCH
  • the apparatus 20 of this embodiment may include means, such as the processing circuitry 22, the processor 24 or the like, for determining whether neighbor cell interference is being caused by the mobile terminal while the mobile terminal is in the CELL FACH state. See, for example, operation 42 of Figure 4.
  • the apparatus may determine whether neighbor cell interference is being caused by determining whether one or more parameters satisfy respective thresholds and/or whether a reselection criterion is present. For example, to determine the presence of an interference the apparatus, such as a processor, may determine whether the transmission power for signals transmitted via an uplink channel satisfies a respective threshold, whether a path loss for signals received from the neighbor cell satisfies a respective threshold and/or whether an uplink interference level at the neighbor cell satisfies a respective threshold.
  • the apparatus need not issue suspend and/or release the network resource and, instead, the mobile terminal 10 may continue to operate in the CELL FACH state while the apparatus continues to monitor the various parameters for an indication of neighbor cell interference and/or the reselection criteria.
  • the apparatus may also include means, such as the processing circuitry 22, the processor 24, the communication interface 26 or the like, for causing a measurement report to be provided to a network element, such as the serving cell 12, a radio network controller or other network element, in an instance in which it is determined that neighbor cell interference is being caused.
  • the apparatus may include means, such as the processing circuitry, the processor, the communication interface or the like, for causing a network resource, such as an E-DCH, to be modified. See operation 44 of Figure 4. As described with respect to operation 36 of Figure 3, the apparatus may release and/or suspend the E-DCH resource. As shown in operation 46 of Figure 4, the apparatus 20 may also include means, such as the processing circuitry 22, the processor 24, communications interface 26 or the like, for causing the reselection of a serving cell.
  • a network resource such as an E-DCH
  • the apparatus 20, method and computer program product as described herein enables a mobile terminal 10 to perform cell reselection when a network resource, such as an E-DCH, is allocated.
  • the apparatus, method and computer program product as described herein further allows flexible conditions as to the suitable conditions to perform reselection (e.g., large amount of data may cause high interference thereby indicating reselection).
  • the apparatus, method and computer program product as described herein avoids causing interference to neighbor cells 16, radio link failures and dropped calls, while avoiding complex interference control algorithms.
  • the apparatus, method and computer program product as described herein further provides for dynamic load balancing between frequencies with reduced latency and reduced power consumption.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention porte sur un procédé, un appareil et un produit programme d'ordinateur destinés à déclencher une resélection d'une cellule de desserte dans le cas où un terminal mobile peut être en train de créer un brouillage de cellule voisine. Sur la base de données de resélection reçues, le terminal mobile peut libérer et/ou suspendre une ressource réseau, telle qu'un canal dédié amélioré, de manière à déclencher une resélection d'une nouvelle cellule de desserte. A cet égard, un procédé est décrit, lequel consiste à déterminer la présence d'une condition de resélection sur la base de données de resélection. Dans le cas où la présence de la condition de resélection est déterminée, le procédé consiste à amener une ressource réseau à être modifiée. Le procédé consiste également à provoquer une resélection d'une cellule de desserte.
PCT/IB2012/054153 2011-08-15 2012-08-15 Resélection de cellule de communication sans fil WO2013024443A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201280036974.4A CN103891350A (zh) 2011-08-15 2012-08-15 无线通信小区重选

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1114029.0A GB2493724B (en) 2011-08-15 2011-08-15 Wireless communications cell reselection
GB1114029.0 2011-08-15

Publications (1)

Publication Number Publication Date
WO2013024443A1 true WO2013024443A1 (fr) 2013-02-21

Family

ID=44764510

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2012/054153 WO2013024443A1 (fr) 2011-08-15 2012-08-15 Resélection de cellule de communication sans fil

Country Status (3)

Country Link
CN (1) CN103891350A (fr)
GB (1) GB2493724B (fr)
WO (1) WO2013024443A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108924927B (zh) * 2017-04-13 2023-02-24 中兴通讯股份有限公司 标识分配、消息、参数发送、处理方法及装置
WO2018222093A1 (fr) * 2017-05-30 2018-12-06 Telefonaktiebolaget Lm Ericsson (Publ) Assistance de procédure de resélection de cellule et dispositifs associés

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080267061A1 (en) * 2007-04-30 2008-10-30 Interdigital Technology Corporation Method and apparatus for handling cell reselections and transitions to and from an enhanced cell_fach state
US20090168728A1 (en) * 2008-01-02 2009-07-02 Interdigital Patent Holdings, Inc. Method and apparatus for cell reselection
WO2009117667A1 (fr) * 2008-03-21 2009-09-24 Interdigital Patent Holdings, Inc. Procédé destiné à prendre en charge la resélection de cellules dans un réseau hspa évolué

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006106561A1 (fr) * 2005-03-29 2006-10-12 Mitsubishi Denki Kabushiki Kaisha Procede de commande de transfert, appareil de commande de station de base et station mobile
TWI427960B (zh) * 2007-10-25 2014-02-21 Interdigital Patent Holdings 無線通信競爭式存取中控制上鏈反饋資訊方法及裝置
RU2441350C1 (ru) * 2007-10-29 2012-01-27 Интердиджитал Пэйтент Холдингз, Инк. Способ для обнаружения сбоя в линии радиосвязи при передаче по усовершенствованному выделенному каналу в состоянии cell_fach
WO2009060397A1 (fr) * 2007-11-05 2009-05-14 Nokia Corporation Procédé et appareil pour fournir une resélection de cellule
ES2433208T3 (es) * 2008-01-04 2013-12-09 Interdigital Patent Holdings, Inc. Método y aparato para realizar una transición de estado de WTRU con RACH mejorado en sistemas HSPA
US8532599B2 (en) * 2008-02-01 2013-09-10 Interdigital Patent Holdings, Inc. Method and apparatus for enabling cell reselection for WTRU operating in discontinuous reception
EP2232912B1 (fr) * 2008-02-06 2011-05-18 Telefonaktiebolaget LM Ericsson (publ) Débit commandé par réseau pour canal fach de liaison montante amélioré
CN104270748B (zh) * 2008-03-31 2018-09-04 爱立信电话股份有限公司 为小区转发接入信道状态中的增强型专用信道处理标识符
US9516657B2 (en) * 2011-04-01 2016-12-06 Interdigital Patent Holdings, Inc. Controlling inter-cell interference in forward access channel (Cell—FACH) state

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080267061A1 (en) * 2007-04-30 2008-10-30 Interdigital Technology Corporation Method and apparatus for handling cell reselections and transitions to and from an enhanced cell_fach state
US20090168728A1 (en) * 2008-01-02 2009-07-02 Interdigital Patent Holdings, Inc. Method and apparatus for cell reselection
WO2009117667A1 (fr) * 2008-03-21 2009-09-24 Interdigital Patent Holdings, Inc. Procédé destiné à prendre en charge la resélection de cellules dans un réseau hspa évolué

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
INTERDIGITAL: "Discussion on the need for UL interference control mechanisms in CELL_FACH state", 3GPP DRAFT; R2-113295, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Barcelona, Spain; 20110509, 2 May 2011 (2011-05-02), XP050495176 *
QUALCOMM INCORPORATED: "On the benefits of signaling based Interference control in CELL_FACH", 3GPP DRAFT; R2-112851 ON_BENEFITS_SIG_BASED_INT_CONTROL_CELL_FACH, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG2, no. Barcelona, Spain; 20110509, 3 May 2011 (2011-05-03), XP050495253 *

Also Published As

Publication number Publication date
CN103891350A (zh) 2014-06-25
GB2493724A (en) 2013-02-20
GB2493724B (en) 2015-01-07
GB201114029D0 (en) 2011-09-28

Similar Documents

Publication Publication Date Title
US10999774B2 (en) Method and apparatus for inter-cell load distribution and interference mitigation in wireless communication system
US9674847B2 (en) Device to-device communication
US9432818B2 (en) Controlling communication devices
KR102091476B1 (ko) 통신 네트워크에서의 리소스 관리를 위한 리소스 컨트롤러
US20150105081A1 (en) Method And Apparatus For Triggering Cell Reselection Based On A Resource Suspension
US8879576B2 (en) Method and apparatus for unlicensed band operation
US20200092210A1 (en) Policy Based Dual Connectivity Traffic Steering
US20130045693A1 (en) Method and apparatus for triggering measurement reporting based upon neighbor cell interference
JP2016537935A (ja) バッテリーの現在の充電の状態に基づいてモデム電力を低減するための方法及び装置
US20130045771A1 (en) Method and apparatus for uplink interference control
US9750021B2 (en) Wireless communication system, wireless communication method, mobile station device, base station device, program, and recording medium
US9185635B2 (en) Method and apparatus for supporting proximity-based services
US20140177557A1 (en) Method and Apparatus for Cell Activation
WO2015135431A1 (fr) Procédé de sélection de groupe de ressources de transmission d2d et équipement d'utilisateur de transmission d2d
KR102041174B1 (ko) 캐리어 어그리게이션 기술에서의 캐리어 선택 방법과 장치
WO2013024443A1 (fr) Resélection de cellule de communication sans fil
KR20180014785A (ko) 제3자 엔티티를 통한 사용자 장비의 전력 관리를 위한 시스템 및 방법
WO2013024442A1 (fr) Rapport de mesure de communication sans fil
US20130083738A1 (en) Method and apparatus for modifying resource allocation
JP2022507564A (ja) 通信方法および装置
EP4044698A1 (fr) Procédé et dispositif de communication
CN112771914B (zh) 无线电资源测量的执行方法、无线设备和网络节点
US9742677B2 (en) Methods and apparatus for managing communications network loading
WO2014173430A1 (fr) Ressources dans un système de communications
GB2499774A (en) Controlling uplink transmission power to reduce neighbour cell interference

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12780281

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12780281

Country of ref document: EP

Kind code of ref document: A1